HG/T 20592  法兰盖 BL 300-10 FF4& S=4/3 b=5FlH1

BL300(A)-10 FF4& S=4/3 b=5FlH1

wn150-16rfF S=4.5fS=8)-

wn150(b)-40fm s=8 h2¡ã©0-16 RFsmebRF1000-1

WN 450-300 RF B=42916000-1.0/63) H=21500f1001hgc000-150

WN 25-150 RF S=100ekEXGW

BL 200-300 RF-1

WN250(B)-16RFS=18 S=009 B8 HfF S s000S5blA=

WN250-60